Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais regras têm um método de ko (punch)?
 ###Tabelas: CREATE TABLE michigan_48_case_6 (michigan_48_case_6_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Touchdowns INT, Extra points INT, Field goals INT, Points INT) CREATE TABLE during_summer_break (during_summer_break_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Outgoing manager VARCHAR, Manner of departure VARCHAR, Date of vacancy VARCHAR, Replaced by VARCHAR, Date of appointment VARCHAR) CREATE TABLE partial_kickboxing_record (partial_kickboxing_record_id AUTO_INCREMENT PRIMARY KEY, Result VARCHAR, Opponent VARCHAR, Method VARCHAR, Event VARCHAR, Date VARCHAR, Round VARCHAR, Time VARCHAR, Location VARCHAR, Rules VARCHAR) CREATE TABLE west_donegal_railway (west_donegal_railway_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Type VARCHAR, Fleet numbers VARCHAR, Quantity made INT, Manufacturer VARCHAR, Date made INT, Date withdrawn VARCHAR) CREATE TABLE torneo_clausura_"closing"_tournament (torneo_clausura_"closing"_tournament_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Points INT, Played INT, Drawn INT, Lost INT, Against INT, Diff INT)  
SELECT Rules FROM partial_kickboxing_record WHERE Method = ko (punch)